import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.HashMap;
import java.util.Map; 
import sun.misc.BASE64Decoder;  
import sun.misc.BASE64Encoder;
@SuppressWarnings("unused")
public class Keys {
    public static final String KEY_ALGORITHM = "RSA";
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";
    private static final String PUBLIC_KEY = "RSAPublicKey";
    private static final String PRIVATE_KEY = "RSAPrivateKey";
 
public static void main(String[] args) {
Map<String, Object> keyMap;
try {
keyMap = initKey();
String publicKey =  getPublicKey(keyMap);
System.out.println(publicKey);
String privateKey =  getPrivateKey(keyMap);
System.out.println(privateKey);
} catch (Exception e) { 
e.printStackTrace();
}	 
}
public static String getPublicKey(Map<String, Object> keyMap) throws Exception {
         Key key = (Key) keyMap.get(PUBLIC_KEY); 
         byte[] publicKey = key.getEncoded(); 
return encryptBASE64(key.getEncoded());
}
public static String getPrivateKey(Map<String, Object> keyMap) throws Exception {
         Key key = (Key) keyMap.get(PRIVATE_KEY); 
         byte[] privateKey =key.getEncoded(); 
return encryptBASE64(key.getEncoded());
}  
           
    public static byte[] decryptBASE64(String key) throws Exception {               
        return (new BASE64Decoder()).decodeBuffer(key);               
    }                                 
               
    public static String encryptBASE64(byte[] key) throws Exception {               
        return (new BASE64Encoder()).encodeBuffer(key);               
    }       
    
public static Map<String, Object> initKey() throws Exception {
KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
keyPairGen.initialize(1024);
KeyPair keyPair = keyPairGen.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
Map<String, Object> keyMap = new HashMap<String, Object>(2);
keyMap.put(PUBLIC_KEY, publicKey);
keyMap.put(PRIVATE_KEY, privateKey);
return keyMap;
}
}
